Journal
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
Volume 16, Issue 5, Pages 4534-4538Publisher
AMER SCIENTIFIC PUBLISHERS
DOI: 10.1166/jnn.2016.11008
Keywords
Reduced Graphene Oxide; Ru-Doped Silica; Hybrid Materials; Electrochemiluminescence
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Funding
- Basic Science Research Programs through the National Research Foundation of Korea [NRF-2012R1A1A2005473, NRF-2012-0009838]
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Hybrid materials consisting of electrically conductive reduced graphene oxide (RGO) and Ru(bpy)(3)(2+)-doped silica (Ru@SiO2) nanoparticles were synthesized by hydrolysis of TEOS in the presence of Ru(bpy)(3)Cl-2 and RGO. Many spherical Ru@SiO2 nanoparticles, of an average size of 96 nm, were observed to be strongly anchored on a planar RGO surface in SEM and TEM images. FTIR and EDS analyses confirmed the chemical compositions and functional groups of Ru@SiO2 and partially reduced RGO. The RGO prepared by 200 degrees C thermal treatment of GO in N-2 was probed to have a multilayered sheet structure by XRD. An absorption spectrum of the hybrid exhibited a considerable red-shift in the characteristic visible peak of free Ru(bpy)(3)(2+) centered at 452 nm due to electrostatic interactions between Ru(bpy)(3)(2+) and negatively charged silica, indicating strong immobilization of Ru(bpy)(3)(2+) in the silica matrix.
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